Colloidal Synthesis and Nanocharacterization of Engineered Noble Metal Nanoparticles

Kenechukwu A. Onubogu, I. Medina-Ramírez, S. Bashir, Zhiping Luo, J. Liu
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引用次数: 9

Abstract

ABSTRACT Engineered noble (silver [Ag], gold [Au], and platinum [Pt]) metallic nanoparticles (ENPs) were prepared in gum arabic solutions using a facile, economical, and nontoxic synthetic route. Advanced instrumentation techniques (ultraviolet-visible spectroscopy, X-ray powder diffraction, high-resolution transmission electron microscopy equipped with X-ray energy dispersive spectroscopy, and dynamic light scattering) were applied to characterize the morphology, particle size distribution, elemental composition, and electrokinetics behavior of the ENPs. The analytical results of morphology and elemental composition suggest a size-controlled growth mechanism that yields monodispersed metallic particles (3.5–10.2 nm in diameter), indicating that the nanostructured products were highly crystalline and monodispersed. Zeta potential data confirmed that stable ENPs can be produced using a green chemistry approach. The ENPs displayed excellent stability as measured by zeta potential from −55 to −35 mV over a 2...
工程贵金属纳米颗粒的胶体合成和纳米表征
摘要:采用一种简单、经济、无毒的合成方法,在阿拉伯胶溶液中制备了工程贵金属(银[Ag]、金[Au]和铂[Pt])金属纳米粒子(ENPs)。采用先进的仪器技术(紫外-可见光谱、x射线粉末衍射、配备x射线能量色散光谱的高分辨率透射电子显微镜和动态光散射)来表征ENPs的形貌、粒度分布、元素组成和动力学行为。形貌和元素组成分析结果表明,纳米结构产物具有高度结晶性和单分散性,其生长机制受尺寸控制,可生成直径为3.5 ~ 10.2 nm的单分散金属颗粒。Zeta电位数据证实,使用绿色化学方法可以产生稳定的ENPs。通过zeta电位在−55 ~−35 mV范围内测量,ENPs具有优异的稳定性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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